because the insurance companies have to make a profit on top of their administrative cost, medicare doesn't have to do that and it's lowered administrative costs and therefore a better deal. he said that romney's idea of premium support helping people buy insurance in the private marketplace, all economists agree the premium support will cause medicare to collapse. >> now that's an arguable point and i think that romney is going to engage him on those issues and try to continue to make the case for private sector health insurance. >> what i found interesting about this exchange is remember, obamacare was supposed to be romney's achilles heel throughout the primaries, his rivals said he wouldn't be able to challenge on that, and i think he proved a lot of people wrong. >> he pushed right through that and went on offense. >> and it's an example of his effort to reach across the aisle. >> bipartisanship, that's interesting. >> paul: let's look at an ad, a question how the democrats and obama is going to respond. the ad they rolled out after the debate. >> i'm barack obama and i approve